A ball gown's the most formal female attire for social occasions. According to rules of etiquette, a ball gown must be worn where "white tie" or "evening dress"'s specified on the invitation. It's traditionally a full-skirted gown reaching at least to the ankles, made of luxurious fabric, delicately and exotically trimmed. Most versions are cut off the shoulder with decollete necklines. Such gowns are typically worn with a stole (a formal shawl in expensive fabric), cape or cloak in lieu of a c… (More on Ballgown)